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Comparative transcriptomics of seven Impatiens species
bioRxiv - Plant Biology Pub Date : 2021-09-16 , DOI: 10.1101/2021.09.16.460688
Mária Šurinová , Štepán Stočes , Tomáš Dostálek , Andrea Jarošová , Zuzana Münzbergová

Impatiens is a genus containing more than 1000 species. Thanks to its size, it is a unique system for studying species diversification in natural populations. This study focused on the characterization of novel transcriptomes from seven Impatiens species originating from Nepal. Leave transcriptome of Impatines balsamina L., I. racemosa DC., I. bicornuta Wall, I. falcifer Hook, I. devendrae Pusalkar, I. scullyi Hook and I. scabrida DC were sequenced and compared. Reads were de novo assembled and aligned to 92 035-226 081 contigs. We identified 14 728 orthology groups shared among all the species and 3 020 which were unique to a single species. In single species, 2536-3009 orthology groups were under selection from which 767 were common for all species. Six of the seven investigated species shared 77% of gene families with I. bicornuta being the most distinct species. Specific gene families involved in response to different environmental stimuli were closely described. Impatiens bicornuta selection profile shared selection on zing finger protein structures and flowering regulation and stress response proteins with the other investigated species. Overall, the study showed substantial similarity in patterns of selections on transcribed genes across the species suggesting similar evolutionary pressures. This suggests that the species group may have evolved via adaptive radiation.

中文翻译:

七种凤仙花的比较转录组学

凤仙花是一个包含 1000 多个物种的属。由于它的大小,它是一个独特的系统,用于研究自然种群中的物种多样化。这项研究的重点是来自尼泊尔的七种凤仙花物种的新型转录组的表征。留下Impatines balsamina L. , I. racemosa DC 的转录组。、I. bicornuta Wall 、I. falcifer Hook 、I. devendrae Pusalkar、I. scullyi Hook 和I. scabrida DC 进行了测序和比较。读取是从头开始的组装并对齐到 92 035-226 081 个重叠群。我们确定了所有物种共有的 14 728 个直系群和单个物种独有的 3 020 个直系群。在单个物种中,选择了 2536-3009 个直系群,其中所有物种共有 767 个直系群。被调查的七个物种中有六个共享 77% 的基因家族,其中I. bicornuta是最独特的物种。详细描述了参与响应不同环境刺激的特定基因家族。双角凤仙花选择概况与其他研究的物种共享对 zing 指蛋白结构和开花调节和应激反应蛋白的选择。总体而言,该研究表明,跨物种转录基因的选择模式具有很大的相似性,这表明进化压力相似。这表明该物种可能是通过适应性辐射进化而来的。
更新日期:2021-09-19
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